US20180287471A1 - Integrated drive generator housing - Google Patents
Integrated drive generator housing Download PDFInfo
- Publication number
- US20180287471A1 US20180287471A1 US16/001,325 US201816001325A US2018287471A1 US 20180287471 A1 US20180287471 A1 US 20180287471A1 US 201816001325 A US201816001325 A US 201816001325A US 2018287471 A1 US2018287471 A1 US 2018287471A1
- Authority
- US
- United States
- Prior art keywords
- bearing
- housing portion
- center housing
- bearing liner
- center
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 claims abstract description 9
- 238000003754 machining Methods 0.000 claims abstract description 6
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 229910052749 magnesium Inorganic materials 0.000 description 2
- 238000003801 milling Methods 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 229910000861 Mg alloy Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/16—Centering rotors within the stator; Balancing rotors
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/18—Structural association of electric generators with mechanical driving motors, e.g. with turbines
- H02K7/1807—Rotary generators
- H02K7/1823—Rotary generators structurally associated with turbines or similar engines
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49009—Dynamoelectric machine
- Y10T29/49011—Commutator or slip ring assembly
Definitions
- This disclosure relates to a housing for an integrated drive generator for a gas turbine engine, for example.
- the disclosure also relates to a mounting configuration for a hydraulic unit of the integrated drive generator relative to its housing.
- One example type of integrated drive generator includes a generator, a hydraulic unit and a differential assembly arranged in a common housing.
- the differential assembly is operatively coupled to a gas turbine engine via an input shaft.
- the rotational speed of the input shaft varies during the operation of the gas turbine engine.
- the hydraulic unit cooperates with the differential assembly to provide a constant speed to the generator throughout engine operation.
- the housing includes generator, center and input housing portions, which may be constructed from a magnesium alloy.
- the hydraulic unit is mounted to the center housing portion, which is sealed relative to the generator and input housing portions with seal plates.
- the center housing has spaced apart lateral sides.
- the hydraulic unit includes a structural can that is mounted to one of the sides. It can be difficult to maintain the flatness in a machined magnesium surface.
- the sides have been machined flat in the area of the hydraulic unit across the center housing portion in the area of the hydraulic unit and the surrounding surface, which maintains flatness of the center housing portion to ensure that it adequately seals relative to the other housing portions.
- a bearing liner is pressed into a bore in the center housing portion to support a hydraulic unit shaft. The bearing liner is flush with the lateral surface opposite the can. The surface is subsequently machined right over the bearing liner, better ensuring flatness.
- a method of assembling an integrated drive generator includes the steps of providing a bore in a center housing portion, pressing a bearing liner into the bore, with a portion of the bearing liner extending proud of a surface of the center plate, and machining the surface around and adjacent to the bearing liner to provide a machined surface parallel to the surface.
- the method includes securing the generator, center and input housing portions to one another.
- the center housing portion is sealed relative to the generator and input housing portions with seal plates.
- a hydraulic unit is mounted to the center housing portion.
- the center housing portion includes first and second parallel surfaces.
- the machined surface is parallel to and recessed into one of the first and second surfaces in an area of the hydraulic unit.
- the hydraulic unit includes a shaft supported by a bearing in the center housing portion.
- the machined surface surrounds the bearing.
- the bearing includes a bearing liner that extends proud of the machined surface.
- the bearing liner is in an interference fit in a bore that is in the center housing portion.
- the bearing liner includes first and second flanges opposite one another.
- the second flange engages with the second surface.
- the first flange is proud of the first surface and engages the bearing.
- the bearing is a roller bearing.
- the machined surface may provide a lip that circumscribes the bearing liner.
- FIG. 1 is a highly schematic view of a generator system.
- FIG. 2 is a cross-sectional schematic view of an example integrated drive generator.
- FIG. 3 is a schematic perspective view of a generator, a hydraulic unit and a differential assembly of the integrated drive generator shown in FIG. 2 .
- FIG. 4 is a cross-sectional view through the hydraulic unit.
- FIG. 5 is an enlarged cross-sectional view of in an area of a bearing supporting a hydraulic unit shaft relative to a center housing portion.
- FIG. 6 is an enlarged cross-sectional view of the hydraulic unit mounted to the center housing portion.
- FIG. 1 An example generator system 10 is schematically illustrated in FIG. 1 .
- the system 10 includes a gas turbine engine 12 that provides rotational drive to an integrated drive generator (IDG) 16 through an accessory drive gearbox 14 mounted on the gas turbine engine 12 .
- the accessory drive gearbox 14 is coupled to a spool of the engine 12 , and the speed of the spool varies throughout engine operation.
- the IDG 16 includes a housing 18 having generator, center and input housing portions 20 , 22 , 24 secured to one another.
- a generator 40 is arranged in the generator housing portion 20 .
- Seal plates 23 are provided on either side of the center housing 22 to seal the center housing 22 relative to the generator and input housing portions 20 , 24 .
- An input shaft 26 receives rotational drive from the accessory drive gearbox 14 .
- the rotational speed of the input shaft 26 varies depending upon the operation of the engine 12 .
- a hydraulic unit 32 cooperates with the differential assembly 28 to convert the variable rotational speed from the input shaft 26 to provide a fixed rotational output speed to the generator 40 .
- the input shaft 26 rotationally drives a differential input gear 30 that is coupled to a hydraulic input gear 34 of the hydraulic unit 32 .
- the differential input gear 30 is operatively coupled to the input shaft 26 by the disconnect assembly 27 .
- the hydraulic output gear 36 is coupled to a differential speed trim gear 38 .
- the hydraulic unit 32 increases or decreases the rotational speed provided to the differential unit 28 from the hydraulic input gear 34 to provide a fixed rotational output speed, such as a 12,000 rpm speed.
- the variable rotational speed of the differential input gear 30 combines with the speed of the differential speed trim gear 38 to provide a fixed rotational speed to a gear input shaft 42 .
- a gear train 44 cooperates with the generator input shaft 42 , which rotates at a constant speed to rotationally drive a charge pump 46 , deaerator 48 , main scavenge pump 50 , inversion pump 52 and generator scavenge pump 54 .
- charge pump 46 deaerator 48
- deaerator 48 main scavenge pump 50
- inversion pump 52 inversion pump 52
- generator scavenge pump 54 generator scavenge pump 54
- the hydraulic unit 32 includes a can 60 that houses and provides structural support for the hydraulic unit components.
- Fixed and variable speed shafts 62 , 64 are arranged coaxially with and nested relative to one another on one side of the hydraulic unit 32 .
- the hydraulic input gear 34 is provided by the variable speed shaft 64
- the hydraulic output gear 36 is provided by the trim speed shaft 62 .
- a speed change shaft 72 is also arranged within the can 60 and is coaxial with the trim and variable speed shafts 62 , 64 .
- a pump plate 66 separates first and second pumping assemblies 68 , 70 , which each include a wobbler and pistons. The pumping assemblies cooperate with one another to increase or decrease the rotational speed of the trim speed shaft 62 .
- a first bearing 74 supports the trim speed shaft 62 relative to the can 60
- a second bearing 76 supports the other end of the trim speed shaft 62 relative to the pump plate 66
- Another second bearing 76 supports the speed change shaft 72 relative to the pump plate 66
- a third bearing 78 supports the other end of the speed change shaft 72 relative to the center housing 22
- a fourth bearing 79 supports the variable speed shaft 64 relative to the input housing 24 .
- the center housing portion 22 includes a bore 80 that receives the third bearing 78 .
- a bearing liner 82 which may be steel, is press-fit into the bore 80 .
- the bearing liner 82 includes first and second flanges 84 , 86 adjoined by a wall 88 that is received in the bore 80 to provide the press-fit. It is desirable to press-fit the bearing liner 82 into the bore 80 prior to machining, since press-fitting may distort the magnesium center housing portion 22 .
- the center housing portion 22 includes first and second surfaces 98 , 100 that are laterally spaced apart from one another.
- the first and second surfaces 98 , 100 may be provided by an initial machining operation that may provide sufficiently flat surfaces for adequate sealing of the seal plates 23 .
- the second flange 86 abuts the second surface 100 to limit the installation depth of the bearing liner 82 during press-fitting.
- the first flange 84 extends proud or beyond the first surface 98 , which is necessary to accommodate the width of the third bearing 78 .
- the third bearing 78 includes an outer race 90 received by the bearing liner 82 in abutting relationship with the first flange 84 .
- Rollers 92 are spaced circumferentially about an inner race 96 , which is provided by the speed change shaft 72 , and engage the outer and inner races 90 , 96 .
- the circumferential spacing of rollers 92 are maintained by a cage 94 .
- the center housing portion 22 is machined to a thinner width than provided by the first and second surfaces 98 , 100 . This may enable a longer hydraulic unit to be accommodated in the same sized housing envelope as previously used IDGs. However, desired flatness of the center housing portion 22 must be maintained to ensure proper sealing of the center housing portion 22 relative to the generator and input housing portions 20 , 24 .
- the first surface 98 is machined, for example, using a milling operation, to provide a machined surface 102 that is parallel with the second surface 100 .
- the bearing liner 82 is installed before machining.
- the can 60 includes a flange 106 that is secured to the center housing portion 22 .
- the flange 106 includes holes 108 aligned with holes 110 in the center housing portion 22 .
- Fasteners 112 are received by the holes 108 , 110 and secure the flange 106 to the center housing portion 22 .
- a machined surface 114 is recessed into the second surface 100 to accommodate the longer hydraulic unit and provide a first lateral thickness T 1 .
- the first lateral thickness T 1 is provided between the first surface 98 and the machined surface 114 , which are parallel to one another.
- a second lateral thickness T 2 is provided between the first and second surfaces 98 , 100 .
- the ratio of the second lateral thickness T 2 to the first lateral thickness T 1 is 1.05.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Mounting Of Bearings Or Others (AREA)
- Details Of Reciprocating Pumps (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
Description
- This disclosure is a divisional of U.S. patent application Ser. No. 14/806,764 filed Jul. 23, 2015 which was a divisional of U.S. patent application Ser. No. 13/542,776 filed Jul. 6, 2012 now granted as U.S. Pat. No. 9,154,011 on Oct. 6, 2015.
- This disclosure relates to a housing for an integrated drive generator for a gas turbine engine, for example. The disclosure also relates to a mounting configuration for a hydraulic unit of the integrated drive generator relative to its housing.
- One example type of integrated drive generator (IDG) includes a generator, a hydraulic unit and a differential assembly arranged in a common housing. The differential assembly is operatively coupled to a gas turbine engine via an input shaft. The rotational speed of the input shaft varies during the operation of the gas turbine engine. The hydraulic unit cooperates with the differential assembly to provide a constant speed to the generator throughout engine operation.
- In one example, the housing includes generator, center and input housing portions, which may be constructed from a magnesium alloy. The hydraulic unit is mounted to the center housing portion, which is sealed relative to the generator and input housing portions with seal plates.
- The center housing has spaced apart lateral sides. The hydraulic unit includes a structural can that is mounted to one of the sides. It can be difficult to maintain the flatness in a machined magnesium surface. The sides have been machined flat in the area of the hydraulic unit across the center housing portion in the area of the hydraulic unit and the surrounding surface, which maintains flatness of the center housing portion to ensure that it adequately seals relative to the other housing portions. A bearing liner is pressed into a bore in the center housing portion to support a hydraulic unit shaft. The bearing liner is flush with the lateral surface opposite the can. The surface is subsequently machined right over the bearing liner, better ensuring flatness.
- In one exemplary embodiment, a method of assembling an integrated drive generator includes the steps of providing a bore in a center housing portion, pressing a bearing liner into the bore, with a portion of the bearing liner extending proud of a surface of the center plate, and machining the surface around and adjacent to the bearing liner to provide a machined surface parallel to the surface.
- In a further embodiment of any of the above, the method includes securing the generator, center and input housing portions to one another. The center housing portion is sealed relative to the generator and input housing portions with seal plates. A hydraulic unit is mounted to the center housing portion. The center housing portion includes first and second parallel surfaces. The machined surface is parallel to and recessed into one of the first and second surfaces in an area of the hydraulic unit. The hydraulic unit includes a shaft supported by a bearing in the center housing portion. The machined surface surrounds the bearing. The bearing includes a bearing liner that extends proud of the machined surface.
- In a further embodiment of any of the above, the bearing liner is in an interference fit in a bore that is in the center housing portion.
- In a further embodiment of any of the above, the bearing liner includes first and second flanges opposite one another. The second flange engages with the second surface. The first flange is proud of the first surface and engages the bearing.
- In a further embodiment of any of the above, the bearing is a roller bearing.
- In a further embodiment of any of the above, the machined surface may provide a lip that circumscribes the bearing liner.
- The disclosure can be further understood by reference to the following detailed description when considered in connection with the accompanying drawings wherein:
- The disclosure can be further understood by reference to the following detailed description when considered in connection with the accompanying drawings wherein:
-
FIG. 1 is a highly schematic view of a generator system. -
FIG. 2 is a cross-sectional schematic view of an example integrated drive generator. -
FIG. 3 is a schematic perspective view of a generator, a hydraulic unit and a differential assembly of the integrated drive generator shown inFIG. 2 . -
FIG. 4 is a cross-sectional view through the hydraulic unit. -
FIG. 5 is an enlarged cross-sectional view of in an area of a bearing supporting a hydraulic unit shaft relative to a center housing portion. -
FIG. 6 is an enlarged cross-sectional view of the hydraulic unit mounted to the center housing portion. - An
example generator system 10 is schematically illustrated inFIG. 1 . Thesystem 10 includes agas turbine engine 12 that provides rotational drive to an integrated drive generator (IDG) 16 through anaccessory drive gearbox 14 mounted on thegas turbine engine 12. Theaccessory drive gearbox 14 is coupled to a spool of theengine 12, and the speed of the spool varies throughout engine operation. - Referring to
FIGS. 2 and 3 , an example IDG 16 is illustrated. In the example, the IDG 16 includes ahousing 18 having generator, center andinput housing portions generator 40 is arranged in thegenerator housing portion 20.Seal plates 23 are provided on either side of thecenter housing 22 to seal thecenter housing 22 relative to the generator andinput housing portions - An
input shaft 26 receives rotational drive from theaccessory drive gearbox 14. The rotational speed of theinput shaft 26 varies depending upon the operation of theengine 12. To this end, as a result, ahydraulic unit 32 cooperates with thedifferential assembly 28 to convert the variable rotational speed from theinput shaft 26 to provide a fixed rotational output speed to thegenerator 40. - The
input shaft 26 rotationally drives adifferential input gear 30 that is coupled to ahydraulic input gear 34 of thehydraulic unit 32. Thedifferential input gear 30 is operatively coupled to theinput shaft 26 by thedisconnect assembly 27. Thehydraulic output gear 36 is coupled to a differentialspeed trim gear 38. Thehydraulic unit 32 increases or decreases the rotational speed provided to thedifferential unit 28 from thehydraulic input gear 34 to provide a fixed rotational output speed, such as a 12,000 rpm speed. The variable rotational speed of thedifferential input gear 30 combines with the speed of the differentialspeed trim gear 38 to provide a fixed rotational speed to agear input shaft 42. - In the example, a
gear train 44 cooperates with thegenerator input shaft 42, which rotates at a constant speed to rotationally drive acharge pump 46,deaerator 48,main scavenge pump 50,inversion pump 52 andgenerator scavenge pump 54. Thus, these components may be designed efficiently to operate at a fixed speed. - Referring to
FIG. 4 , thehydraulic unit 32 includes acan 60 that houses and provides structural support for the hydraulic unit components. Fixed andvariable speed shafts hydraulic unit 32. Thehydraulic input gear 34 is provided by thevariable speed shaft 64, and thehydraulic output gear 36 is provided by thetrim speed shaft 62. - A
speed change shaft 72 is also arranged within thecan 60 and is coaxial with the trim andvariable speed shafts pump plate 66 separates first andsecond pumping assemblies trim speed shaft 62. - A
first bearing 74 supports thetrim speed shaft 62 relative to thecan 60, and asecond bearing 76 supports the other end of thetrim speed shaft 62 relative to thepump plate 66. Anothersecond bearing 76 supports thespeed change shaft 72 relative to thepump plate 66, and athird bearing 78 supports the other end of thespeed change shaft 72 relative to thecenter housing 22. Afourth bearing 79 supports thevariable speed shaft 64 relative to theinput housing 24. - Referring to
FIGS. 4 and 5 , thecenter housing portion 22 includes abore 80 that receives thethird bearing 78. Abearing liner 82, which may be steel, is press-fit into thebore 80. Thebearing liner 82 includes first andsecond flanges wall 88 that is received in thebore 80 to provide the press-fit. It is desirable to press-fit thebearing liner 82 into thebore 80 prior to machining, since press-fitting may distort the magnesiumcenter housing portion 22. Thecenter housing portion 22 includes first andsecond surfaces second surfaces seal plates 23. Thesecond flange 86 abuts thesecond surface 100 to limit the installation depth of thebearing liner 82 during press-fitting. - The
first flange 84 extends proud or beyond thefirst surface 98, which is necessary to accommodate the width of thethird bearing 78. Thethird bearing 78 includes anouter race 90 received by thebearing liner 82 in abutting relationship with thefirst flange 84.Rollers 92 are spaced circumferentially about aninner race 96, which is provided by thespeed change shaft 72, and engage the outer andinner races rollers 92 are maintained by acage 94. - The
center housing portion 22 is machined to a thinner width than provided by the first andsecond surfaces center housing portion 22 must be maintained to ensure proper sealing of thecenter housing portion 22 relative to the generator andinput housing portions first surface 98 is machined, for example, using a milling operation, to provide amachined surface 102 that is parallel with thesecond surface 100. Thebearing liner 82 is installed before machining. - The
can 60 includes aflange 106 that is secured to thecenter housing portion 22. Theflange 106 includesholes 108 aligned withholes 110 in thecenter housing portion 22.Fasteners 112 are received by theholes flange 106 to thecenter housing portion 22. Amachined surface 114, provided for example using a milling operation, is recessed into thesecond surface 100 to accommodate the longer hydraulic unit and provide a first lateral thickness T1. The first lateral thickness T1 is provided between thefirst surface 98 and themachined surface 114, which are parallel to one another. A second lateral thickness T2 is provided between the first andsecond surfaces - Although an example embodiment has been disclosed, a worker of ordinary skill in this art would recognize that certain modifications would come within the scope of the claims. For that reason, the following claims should be studied to determine their true scope and content.
Claims (6)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US16/001,325 US10804778B2 (en) | 2012-07-06 | 2018-06-06 | Integrated drive generator housing |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/542,776 US9154011B2 (en) | 2012-07-06 | 2012-07-06 | Integrated drive generator housing |
US14/806,764 US10014758B2 (en) | 2012-07-06 | 2015-07-23 | Method of assembling integrated drive generator housing and bearing |
US16/001,325 US10804778B2 (en) | 2012-07-06 | 2018-06-06 | Integrated drive generator housing |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US14/806,764 Division US10014758B2 (en) | 2012-07-06 | 2015-07-23 | Method of assembling integrated drive generator housing and bearing |
Publications (2)
Publication Number | Publication Date |
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US20180287471A1 true US20180287471A1 (en) | 2018-10-04 |
US10804778B2 US10804778B2 (en) | 2020-10-13 |
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Application Number | Title | Priority Date | Filing Date |
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US13/542,776 Active 2033-12-31 US9154011B2 (en) | 2012-07-06 | 2012-07-06 | Integrated drive generator housing |
US14/806,764 Active 2033-02-15 US10014758B2 (en) | 2012-07-06 | 2015-07-23 | Method of assembling integrated drive generator housing and bearing |
US16/001,325 Active 2032-12-21 US10804778B2 (en) | 2012-07-06 | 2018-06-06 | Integrated drive generator housing |
Family Applications Before (2)
Application Number | Title | Priority Date | Filing Date |
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US13/542,776 Active 2033-12-31 US9154011B2 (en) | 2012-07-06 | 2012-07-06 | Integrated drive generator housing |
US14/806,764 Active 2033-02-15 US10014758B2 (en) | 2012-07-06 | 2015-07-23 | Method of assembling integrated drive generator housing and bearing |
Country Status (2)
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US (3) | US9154011B2 (en) |
CN (1) | CN103532283B (en) |
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US10323736B2 (en) * | 2017-11-22 | 2019-06-18 | Hamilton Sundstrand Corporation | Integrated drive generator with disconnect plunger |
US10804778B2 (en) * | 2012-07-06 | 2020-10-13 | Hamilton Sundstrand Corporation | Integrated drive generator housing |
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US9528552B2 (en) * | 2015-01-16 | 2016-12-27 | Hamilton Sundstrand Corporation | Roller bearing outer race for hydraulic unit |
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US20190219139A1 (en) * | 2018-01-15 | 2019-07-18 | Hamilton Sundstrand Corporation | Fixed block shaft for integrated drive generator |
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US9154011B2 (en) * | 2012-07-06 | 2015-10-06 | Hamilton Sundstrand Corporation | Integrated drive generator housing |
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2012
- 2012-07-06 US US13/542,776 patent/US9154011B2/en active Active
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2013
- 2013-07-05 CN CN201310280658.8A patent/CN103532283B/en active Active
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2015
- 2015-07-23 US US14/806,764 patent/US10014758B2/en active Active
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2018
- 2018-06-06 US US16/001,325 patent/US10804778B2/en active Active
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US3107946A (en) * | 1958-10-16 | 1963-10-22 | Clevite Harris Products Inc | Resilient bearing mount |
US3777195A (en) * | 1972-02-08 | 1973-12-04 | Bendix Corp | Support for generator bearing |
US7431512B2 (en) * | 2005-11-18 | 2008-10-07 | Hamilton Sundstrand Corporation | Compact lightweight bearing assembly |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10804778B2 (en) * | 2012-07-06 | 2020-10-13 | Hamilton Sundstrand Corporation | Integrated drive generator housing |
US10323736B2 (en) * | 2017-11-22 | 2019-06-18 | Hamilton Sundstrand Corporation | Integrated drive generator with disconnect plunger |
Also Published As
Publication number | Publication date |
---|---|
CN103532283A (en) | 2014-01-22 |
US10014758B2 (en) | 2018-07-03 |
US10804778B2 (en) | 2020-10-13 |
US20150333607A1 (en) | 2015-11-19 |
CN103532283B (en) | 2016-01-20 |
US20140009125A1 (en) | 2014-01-09 |
US9154011B2 (en) | 2015-10-06 |
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